May weather forecast
São João do Cariri, Brazil

May, the last month of the autumn in São João do Cariri, is also a moderately hot month, with an average temperature ranging between min 20°C (68°F) and max 28.6°C (83.5°F).

Temperature

The arrival of May brings an average high-temperature of a still moderately hot 28.6°C (83.5°F), subtly diverging from April's 29.7°C (85.5°F). In São João do Cariri, the May nights cool down to an average low of 20°C (68°F).

Heat index

May's average heat index is calculated to be a torrid 35°C (95°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

The months with the highest humidity in São João do Cariri are May through July, with an average relative humidity of 86%.

Rainfall

In May, the rain falls for 21 days. Throughout May, 49mm (1.93") of precipitation is accumulated. In São João do Cariri, during the entire year, the rain falls for 212.6 days and collects up to 486mm (19.13") of precipitation.

Daylight

In May, the average length of the day is 11h and 47min.
On the first day of May in São João do Cariri, sunrise is at 05:27 and sunset at 17:18. On the last day of the month, sunrise is at 05:32 and sunset at 17:15 -03.

Sunshine

In São João do Cariri, Brazil, the average sunshine in May is 5.8h.

UV index

January through June, August through December, with an average maximum UV index of 6, are months with the highest UV index in São João do Cariri. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, the maximum UV index of 6 suggests this advice:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.